NXSTAGE MEDICAL INC

CUSIP: 67072V103 Class: COMMON STOCK

GREAT WEST LIFE ASSURANCE CO /CAN/'s Holding History (CIK: 0001046192)

Note: Option positions (PUT/CALL) are excluded.

Q4 2018
Shares 8,228 Value ($000) $227 Avg Close — Range —
Q3 2018
Shares 8,228 Value ($000) $230 Avg Close — Range —
Q2 2018
Shares 8,228 Value ($000) $230 Avg Close — Range —
Q1 2018
Shares 8,228 Value ($000) $205 Avg Close — Range —
Q4 2017
Shares 8,228 Value ($000) $199 Avg Close — Range —
Q3 2017
Shares 8,228 Value ($000) $226 Avg Close — Range —
Q2 2017
Shares 8,228 Value ($000) $206 Avg Close — Range —
Q1 2017
Shares 8,228 Value ($000) $220 Avg Close — Range —
Q4 2016
Shares 8,228 Value ($000) $217 Avg Close — Range —
Q3 2016
Shares 8,228 Value ($000) $205 Avg Close — Range —
Q2 2016
Shares 8,228 Value ($000) $178 Avg Close — Range —
Q1 2016
Shares 8,228 Value ($000) $123 Avg Close — Range —
Q4 2015
Shares 8,228 Value ($000) $180 Avg Close — Range —
Q3 2015
Shares 8,228 Value ($000) $130 Avg Close — Range —
Q2 2015
Shares 8,228 Value ($000) $117 Avg Close — Range —
Q1 2015
Shares 8,228 Value ($000) $142 Avg Close — Range —
Q4 2014
Shares 8,228 Value ($000) $147 Avg Close — Range —
Q3 2014
Shares 8,228 Value ($000) $108 Avg Close — Range —
Q2 2014
Shares 1,831 Value ($000) $26 Avg Close — Range —
Q1 2014
Shares 1,831 Value ($000) $23 Avg Close — Range —
Q4 2013
Shares 1,831 Value ($000) $18 Avg Close — Range —